← USPTO Patent Grants

Method of preparing negative electrode active material

Grant US12592377B2 Kind: B2 Mar 31, 2026

Assignee

LG ENERGY SOLUTION, LTD.

Inventors

Suk Woo Lee, Dong Sik Yoon

Abstract

Disclosed is a method of preparing a negative electrode active material which includes (a) dispersing an active material core in a solution containing a surfactant to coat the surfactant on the active material core, (b) adding and dispersing a first precursor, which is bondable with the surfactant by electrostatic attraction, in the solution, (c) adding and dispersing a second precursor, which is bondable with the first precursor by electrostatic attraction, in the solution, (d) preparing a lithium compound precursor by a hydrothermal reaction of the first precursor and the second precursor in the solution, and (e) performing a heat treatment on the lithium compound precursor to thermally decompose the surfactant, and forming a protective layer containing a lithium compound on the active material core, wherein one of the first precursor and the second precursor is at least one selected from lithium hydroxide, lithium oxide, lithium nitrate or lithium sulfate.

CPC Classifications

H01M 4/049 H01M 4/366 H01M 4/386 H01M 4/5825 H01M 4/587 H01M 2004/021 H01M 2004/027 H01M 4/136 H01M 4/1397 H01M 10/0525 H01M 4/625 H01M 4/483 H01M 4/624 H01M 4/628 H01M 10/052 H01M 4/62 Y02E 60/10 C01B 32/21 C01B 25/45 C01B 33/02 C01P 2004/80 C01P 2006/40

Filing Date

2020-12-22

Application No.

17608223

Claims

15

View original document →